What is Seam Sealing and Why is it Important?
The level of waterproofness is determined using a Hydrostatic Head rating. Learn more.
Please try again later. What should I get?
When you work hard, you outerwear needs to work even harder. Not to worry, our guide to waterproof technology is here to help.
The first is in millimeters mm and is a measure of how waterproof a fabric is.
Fall Series; Alpine Series. It is normally treated with DWR so it is water resistant. The same applies to clothing. This field is required. In the real world, the fabric does not sit neatly on the end of a test tube; instead it rubs up against your other clothing.
Sitting alongside their waterproof and breathability ratings, these fabrics are also typically classed in layers; either 2 layer, 2. The second number is a measure of how breathable the fabric is - this is normally expressed in terms of how many grams g of water vapor can pass through a square meter m2 of the fabric from the inside to the outside in a 24 hour period.
The larger the number, the more breathable the fabric. How Waterproof is my Coat: